AudioBuffer: AudioBuffer() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

The AudioBuffer constructor of the Web Audio API creates a new AudioBuffer object.

Syntax

js
new AudioBuffer(options)

Parameters

options

Options are as follows:

length

The size of the audio buffer in sample-frames. To determine the length to use for a specific number of seconds of audio, use numSeconds * sampleRate.

numberOfChannels

The number of channels for the buffer. The default is 1, and all user agents are required to support at least 32 channels.

sampleRate

The sample rate in Hz for the buffer. The default is the sample rate of the context used in constructing this object. User agents are required to support sample rates from 8,000 Hz to 96,000 Hz (but are allowed to go farther outside this range).

Exceptions

NotSupportedError DOMException

Thrown if one or more of the options are negative or otherwise has an invalid value (such as numberOfChannels being higher than supported, or a sampleRate outside the nominal range).

RangeError

Thrown if there isn't enough memory available to allocate the buffer.

Specifications

Specification
Web Audio API
# dom-audiobuffer-audiobuffer

Browser compatibility